Q-Tech QT24T User Manual

INCH-POUND
MIL-PRF-55310/21G

14 November 2008
SUPERSEDING

MIL-PRF-55310/21F
09 June 2008

PERFORMANCE SPECIFICATION SHEET

OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)),

1.0 MHz THROUGH 60.0 MHz, HERMETIC SEAL, SQUARE WAVE, TTL

This specification is approved for use by all Departments
and Agencies of the Department of Defense.

The requirements for acquiring the product described herein
shall consist of this specification sheet and MIL-PRF-55310.

FIGURE 1. Dimensions and configuration

.

AMSC N/A FSC 5955

MIL-PRF-55310/21G

Pin number Function
1-9 NC
10 B- (GND/CASE)
11 OUTPUT
12 NC
13 B+ (see note 5)
14-19 NC
20 B+ (optional)

(see note 5)

A --- .120 --- 3.05
b .010 .022 0.25 0.56

c .005 .015 0.13 0.38
D --- .650 --- 16.51
E --- .650 --- 16.51

e .045 .055 1.14 1.40

L 1.250 --- 31.75 --­Q --- .060 --- 1.52

Inches mm Ltr

Min Max Min Max

NOTES:

1. Dimensions are in inches.

2. Metric equivalents are given for general information only.

3. Unless otherwise specified, tolerances are ±.005 (0.13 mm) for three place decimals and ±.02 (0.5 mm) for
two place decimals.

4. The leads shall be symmetrical with respect to the package so that the spacing between the first lead and the
end of the package shall be equidistant on each side.

5. Unit shall meet all requirements with pin 13 and pin 20 simultaneously tied to supply voltage.

6. Lead numbers are for reference only and need not be marked on unit.

7. All pins with NC function may be connected internally and are not to be used as external tie points or

connectors.

FIGURE 1. Dimensions and configuration

.

REQUIREMENTS:
Interface and physical dimensions: See figure 1.
Mounting: See figure 1.
Pads: See figure 1.
Seal: Hermetic in accordance with MIL-PRF-55310

, maximum leakage rate 5 x 10

-8

atm cc/s.
Weight: 4 grams, maximum.
Oscillator: Class 2 or any class 1 or class 3 oscillator meeting all class 2 requirements and verification tests

specified herein and in MIL-PRF-55310

.
Calibration: Manufacturer calibrated.
Screening: In accordance with MIL-PRF-55310

, product level B or S, as applicable.
Temperature:
Operating: See table I.
Storage: -62°C to +125°C.
Oscillator load: Standard TTL loads (see table I).
Output waveform: Symmetrical square wave.

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